我们可以看一下,ArrayList实现类源码中的第一段注释: Resizable-array implementation of the List interface. Implements all optional list operations, and permits all elements, including null. In addition to implementing the List interface, this class provides methods to manipulate the size of the array t...
The ArrayList class in Java is a part of the Java Collections Framework. It is a resizable array, which means it can grow or shrink dynamically. This feature makes ArrayList a popular choice for handling data in Java. An ArrayList has several key characteristics and methods that make it uniqu...
2.1. With Java 9 Since Java 9, we can use aList<E>.of(E… elements)static factory method to create an immutable list: @Test(expected = UnsupportedOperationException.class)publicfinalvoidgivenUsingTheJava9_whenUnmodifiableListIsCreated_thenNotModifiable(){finalList<String> list =newArrayList<>(...
println(array.remove(3));// public E set(intindex,E element)：修改指定索引处的元素，返回被修改的元素 System.out.println(array.set(1,"javaee"));// 发生索引越界异常 IndexOutOfBoundsException System.out.println(array.set(3,"javaee"));// public E get(intindex)：返回指定索引处的元...
javaee"));//public E remove(int index):删除指定索引处的元素,返回被删除的元素System.out.println(array.remove(1));//IndexOutOfBoundsExceptionSystem.out.println(array.remove(3));//public E set(int index,E element):修改指定索引处的元素,返回被修改的元素System.out.println(array.set(1,"java...
(1));//IndexOutOfBoundsException// System.out.println(array.remove(3));//public E set(int index,E element):修改指定索引处的元素,返回被修改的元素// System.out.println(array.set(1,"javaee"));//IndexOutOfBoundsException// System.out.println(array.set(3,"javaee"));//public E get(...
In Java, we need to declare the size of an array before we can use it. Once the size of an array is declared, it's hard to change it. 在Java中,我们需要先声明数组的大小,然后才能使用它。一旦声明了数组的大小,就很难更改它。 To handle this issue, we can use theArrayListclass. TheArra...
publicclassArrayListDemo02{publicstaticvoidmain(String[]args){//创建集合ArrayList<String>array=newArrayList<String>();//添加元素array.add("hello");array.add("world");array.add("java");//public boolean remove(Object o):删除指定的元素,返回删除是否成功// System.out.println(array.remove("world")...
经过对运行结果的分析,发现问题都指向了 ArrayList 中的 remove() 方法,(感觉有种侦探办案的味道,可能是代码写多了的错觉吧,txtx...)那么看 ArrayList 源码是最好的选择了,下面是我截取的关键代码(Java1.8)。 代码语言:javascript 代码运行次数:0 运行 ...
This class is a member of theJava Collections Framework. Added in 1.2. Java documentation forjava.util.ArrayList. Portions of this page are modifications based on work created and shared by theAndroid Open Source Projectand used according to terms described in theCreative Commons 2.5 Attribution Li...